Wrench



D. WEIR.

' Wrench.

( OdeL) Patented Sept. 21,1880.

ATTORNEYS UNITED STATES PATENT OFFICE.

DUNCAN WEIR, OF MARSHALL, TEXAS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 232,581, datedSeptember 21, 1880.

To all whom it may concern Be it known that I, DUNCAN WEIR, of Marshall,in the county of'Harrison and State of Texas, have invented certain newand useful Improvements in Wrenches; and 1 do hereby declare thatthefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which itappertains tomake and use the same, reference being bad to the accompanying drawings,which form a part of this specification, in which- Figure 1 is a sideview of "my improved wrench, partly broken away to expose the actuatingend of the lever on the sliding jaw. Fig. 2 is a longitudinal section.Fig. 3 is a transverse section, on an enlarged scale, through liner 90,Fig. 2. Fig. 4is a front view, and Fig. 5 is a cross-section throughline g y, Fig. 1..

Similar letters of reference indicate corresponding parts in all thefigures.

This invention contemplates improvements in wrenches especially adaptedfor manipulating pipe-joints, though applicable, also, for use inmanipulating nuts, 850.; and. it consists in the detailed constructionand combination of operating parts, as hereinafter more fully described,and particularly pointed out in the claim.

In the accompanying drawings, A marks a vertically-movable jaw, with ascrew-threaded shank, a, inserted through two perforated studs or arms,a, upon the rear side of a slotted box or casting, B, and through amilled nut or burr, O, with its thread engaging the thread of thejaw-shanln The rotation of this nut effects the vertical adjustment ofthe jaw, so as to bring it in contact with the surface of the pipe or'other surface or nut to be operated or turned. This jaw extends out at aright angle to its shank, as shown.

A is the sliding jaw, with an inclined face, and forming, with the faceof the jaw A, a

Application filed July 2, 1880.

(ModeL) wedge-shaped space between them, as seen in Fig. 1, while it isgrooved and formed on each side with a web or flange, b, coinciding,

respectively, with flanges and grooves in the teeth (1. Each of the jawsA A is provided with a serrated or roughened face, to enablev them tofirmly grasp the pipe or other surface.

By grasping the lever and adjusting the jaw A byits nut to one side ofthe pipe or other surface to be grasped, the jaw A being adjusted to theopposite side of the pipe or surface, and then moving the leveroutwardly,

which will move the slidingjaw A inwardly,

the jaws will firmly gripe the pipe or nut, while by removing pressurefrom the handle or lever the jaws will immediately release their hold.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States- The wrench composed of thehandle D, havin g cogs d at its upper end, grooved and slotted box B,having perforated studs a a, adjustable jaw A, having threaded shank aand burr or nut O, and wedge-shaped sliding jaw A, having side flanges,I) b, and cogs or teeth 0, all constructed and combined substantially asand for the purpose herein shown and specified.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

DUN CAN WEIR.

Witnesses:

F. N. NORMAN, J. V. BEER.

